Dear Keiva,
Welcome to the Board ... Delighted to have a new entry into the discussion. Do stay with us.
(book) titled "Like We Say Back Back Home". ....I remember was, "She's as loose as a bucket of soot."
your post reminded me of a few more in similar vein:
"Dumb as a bag full of rocks"
"Sharp as a bowling ball"
That's all I can remember off top of my head. Anyone?
Again, Welcome!!!